Image forming system, recording medium having image forming program recorded thereon and image forming apparatus
AssigneeKonica Minolta Business Technologies, Inc.
InventorTsuyoshi Morimoto
Life of this patent
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Abstract
An image forming system includes an information terminal and an image forming apparatus. The image forming apparatus stores a hash value of a file on which image forming operation is to be performed or has been performed. Upon a request to print a predetermined file at the information terminal, the information terminal generates a hash value of the predetermined file. The information terminal transmits print data and the hash value to the image forming apparatus only in the case where the information terminal determines that hash values stored by the image forming apparatus do not include the generated hash value.
Claims25
An image forming system comprising:
- an information terminal, and
- an image forming apparatus connected to said information terminal via a network,
- said image forming apparatus including a data storage unit storing a hash value of a file to be subjected to or having been subjected to image forming operation,
- said information terminal including:
- an acceptance unit accepting a print request to print a predetermined file,
- a first generation unit generating print data for printing said predetermined file by said image forming apparatus;
- a second generation unit generating a hash value of said predetermined file;
- a determination unit making a determination as to whether or not hash values stored by said data storage unit include the hash value generated by said second generation unit;
- and
- a transmission unit transmitting said print data and said hash value to said image forming apparatus only in a case where said determination unit determines that the hash values stored by said data storage unit do not include the hash value generated by said second generation unit, and
- said image forming apparatus further including:
- a reception unit receiving said print data and said hash value,
- an image forming unit performing image forming operation based on said print data received by said reception unit, and
- a storage operation unit operating to store by said data storage unit the hash value received by said reception unit.
A recording medium having an image forming program recorded thereon, said program executed by a computer connected via a network to an image forming apparatus storing a hash value of a file to be subjected to or having been subjected to image forming operation, said computer executing said program to perform the steps of:
- accepting a print request to print a predetermined file,
- generating print data for printing said predetermined file by said image forming apparatus;
- generating a hash value of said predetermined file;
- making a determination as to whether or not hash values stored by said image forming apparatus include said generated hash value;
- and
- transmitting said print data and said hash value to said image forming apparatus only in a case where it is determined that the hash values stored by said image forming apparatus do not include said generated hash value.
An image forming apparatus connected via a network to an information terminal outputting a print request to print a predetermined file, comprising
- a data storage unit storing a hash value of a file to be subjected to or having been subjected to image forming operation,
- a reception unit receiving print data for printing said predetermined file and a hash value of said predetermined file transmitted from said information terminal;
- a storage operation unit operating to store by said data storage unit said received hash value, and
- an image forming unit performing image forming operation for said received print data.
Dependencies are inferred from the claim text.